Mobile Foam Unit
Version 50-150
26 of 36
10.3
Safety valve and pressure adjustment
The integrated safety valve protects the system from excessive pressure and therefore
controls the diversion of water into the bypass circle. Its setting is precisely adjusted
and must not be changed normally. However, i
n case of unsatisfactory performance,
check and adjust it if necessary. For this, remove the front cover of the MFU. The
safety valve is mounted on the right side, above the pump.
By turning the green
handwheel, located at the
safety valve, the output
pressure of the system is
adjustable up to the
maximum of 5
0 bar
. For
this, the MFU has to be
running in WATER-mode,
with the jet-gun NOT
actuated !
First, push the bow-shaped metal lever from horizontal into the full upper position
(1)
.
The safety valve is now conducting pressure and water into the bypass. Only in this
position, the pressure is adjustable by turning the green Handwheel
(2)
.
Set the lever back to working (horizontal) position and
check the new output pressure at the gauge on the front
panel
(3)
. If necessary, repeat the process until the
desired pressure is displayed.
3
Position of the
Safety valve
1
Turning left/right
decreases/increases
the maximum output
pressure
(2)
.
Left = decreasing
Right = increasing
2
ATTENTION
Only at full throttle (WATER function) and
non
actuated
jet gun, the maximum pressure is displayed correctly !
The maximum pressure of
50
bar must not be exceeded !
